I think what happen is that Uber riders request a ride on an app right at the time ride is needed. If a rider does not want to accept a ride because the price is too high then a rider is left without Uber ride and what options left for a rider at that moment…?

I understand Uber price is dynamic, change with demand, but if there is a way to know the price of Uber ride in advance then a rider can make alternate arrangement if Uber price is not acceptable for a rider. Currently such is not available because Uber is on-demand service and cannot predict demand on future time and date.